Congrats!
Sounds like all the pieces are in place to stop backing up save files. Mostly it's a matter of a modest amount of planning ahead, and a sufficient degree of cowardice. And most importantly, somehow avoiding death to boredom.
Your description of the fight is pretty typical. Yeah, you have to phase away a lot--both to heal, and to avoid summons. And yeah, it takes a lot of melee. As Derakon mentioned, ranged combat is a lot easier, but is certainly less satisfying.

The fight with morgoth doesn't seem typical to me, I have found in this new version (4.1.1) morgoth is much harder than he has ever been. I have over this past spring and summer (southern) given birth to, loved, nurtured and raised about 9 characters who have met morgoth (A far greater number that haven't even gotten past a red mold on level 2 of course.)

And morgoth not once have I even scratched him, after sauron being a doddle.

With resists to everything under the sun, he hits with 800-1000 hitpoints each time. One character used up 31 *heal* and life potions and got him down to half stars before I bailed with 200 hp only to be killed by a horned reaper or something.

What class is this with? Warriors tend to have enough AC to take like 500 average damage in melee, with a bunch of free turns due to the less scary spells, in my experience, and everyone else either has free healing, or buffs to take a lot less damage, or has no business being in melee with Morgoth.

I looked, but I couldn't find any character dumps. Those would be extremely helpful in diagnosing the problem.